<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title> 数组去重</title>
</head>

<body>
	<script>
		// function fn(arr) {
		// 	let newArr = Array.from(new Set(arr))
		// 	return newArr
		// }
		// let arr2 = [1, 1, 1, 2, 2]
		// console.log(fn(arr2))
		var arr = [1, 4, 77, 34, 56, 56, 4, 88, 34, 4, 1, 1, 4]
		for (let i = 0; i < arr.length; i++) {
			for (let j = i + 1; j < arr.length; j++) {
				if (arr[i] === arr[j]) {
					arr.splice(j, 1)
					j--
				}
			}
		}
		console.log(arr);
	</script>
</body>

</html>